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Showing result 1 - 5 of 17 essays matching the above criteria.

  1. 1. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies

    University essay from SLU/Dept. of Ecology

    Author : Evelina Andersson; [2023]
    Keywords : spruce bark beetle; population dynamics; conservation areas; biodiversity; natural enemies; species richness; managed forests; woodland key-habitats; nature reserves;

    Abstract : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. READ MORE

  3. 2. Carabidocoenoses and Fragments of Forests : exploring the Carabid Landscape

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Simon Heinrich Arns; [2023]
    Keywords : biodiversity; Carabidae; carabid diversity; entomology; Fragmentation; Fragstats; habitat fragmentation; habitat Heterogeneity; landscape; landscape ecology; landscape Heterogeneity; pitfall trap; quantifying fragmentation;

    Abstract : Epigeic ground beetles (Coleoptera: Carabidae) were sampled between 2021-06-28 and 2021-07-09 using pitfall traps in the Swedish counties Värmland and Gävleborg. The structural properties of the landscapes surrounding these points were estimated from the Swedish Environmental Protection Agency’s national land cover databases and the Swedish Forest Agency’s data for all formally protected and high conservation value forests using patch-based configurational metrics. READ MORE

  4. 3. Sandytor som habitat för insekter : en studie av anlagda och naturliga sandytor i Solna kommun

    University essay from SLU/Dept. of Ecology

    Author : Nelly Zetterquist; [2022]
    Keywords : insekter; sandlevande insekter; vilda bin; skalbaggar; sandmarker; anlägga sandytor; sandbäddar; sandblottor; bohål; kläckhål; miljövariabel; area; lutning; väderstreck; sandjord; täckningsgrad av markvegetation; solexponering; sälg;

    Abstract : Många insekter är beroende av sandiga marker för sin överlevnad. Exempelvis gräver många arter av bin, getingar och skalbaggar sina bon i sandmarker. Under 1900-talet har dock den totala arealen sandmark minskat betydligt till följd av förändrad markanvändning, och tillståndet för sandlevande arter har försämrats. READ MORE

  5. 4. Hur påverkar en skalbaggsås och typ av gröda naturliga fiender och deras predation på bladlöss och ogräsfrön?

    University essay from SLU/Dept. of Ecology

    Author : Lisa Carlstrand; [2022]
    Keywords : skalbaggsås; jordlöpare; Carabidae; kortvingar; Staphylinidae; spindlar; Araneae; marklevande predatorer; naturliga fiender; bevarande biologisk bekämpning;

    Abstract : Den intensifiering av jordbruket som pågått under de senaste decennierna har lett till en förlust av biodiversitet i jordbrukslandskapet, bland annat till följd av att andelen naturliga habitat minskar. En förlust av biodiversitet innebär också en förlust av de ekosystemtjänster vi kan få från olika nyttodjur, såsom naturlig biologisk bekämpning, pollinering och ogräsfröpredation. READ MORE

  6. 5. Tawny owl ( Strix aluco ) and its variation in diet between years

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Casper Ekberg; [2021]
    Keywords : Biology and Life Sciences;

    Abstract : The tawny owl resides in temperate forests in Europe and mainly hunts rodents but can also hunt other animals like birds,invertebrates and bats. In this study I examined how the diet of tawny owls varies during the span of 2018-2020, I also compared the diet found from nest boxes with footage obtained from cameras inside the nestboxes. READ MORE